Here's how to do it without changing anything that's currently on the Note 7.

Wright the number down with the S pen on your phone-anywhere. Then hit the button on your S pen to bring up Smart Select, draw a box around the phone number and it will give you an option to 'auto select' or 'extract text'. Extract Text will save to clipboard then you go into the phone and save as new contract or to existing contact, whatever you need.

There you go. The biggest thing here is to wright clearly so it reads the number as what it is. I wright my 8's a little funny so it always sees them as 6's.